Elastic double coupling for power transmission



July 14, 1925.

G. CATTANEO ELSTIC DOUBLE COUPLING FOR POWER TRANSMISSION Filed July 10. 1923 2 Sheetsl-Sheet 1 Inventor G- CaLrz/e o Ju1y14,1925. y 1,545,548

G. CATTANEO ELSTIG DOUBLE COUPLING FOR FOWER TRANSMISSION Filed July 10 1923 2 Sheets-Sheet 2 G'Qaaneo Patented July 14, 1925.

PATENT oFpFlcE'.

GIUSTINO CATTANEO,` OF`MILAN, ITALY.

ELASTIC DOl/BLE COUPLING Application led July 10,

To alt whom t may concern."

Be it known that I, GIUs'rTNo CATTANEO, subject of the King of Italy, residing at 79 Via Monterosa, Milan, in the Kingdom of Italy, have invented a new and useful Elastic Double Coupling for Power Transmissions, of which the following is a specifica* tion.v

The elastic double coupling forming the object of the present invention aims atdamping the vibrations between a driving organ of the transmission and a driven organ coaxial thereto. The main field of application thereof is to be found in the driving gear for the distribution of internal combustion engines, where it is necessary to damp the vibrations which would otherwlsc be transmitted to the distribution by the shaft by which it is driven.- l

The annexed drawing illustrates by way of example one method of actuating the invention.

' Fig. l is a longitudinal section showing one method of application of' the novel arrangement.

Fig. 2 is a cross section through A-B in Fig. l.

Fig. 3 is a partial longitudinal section to a larger scale.

Fig. e is a partial crossl section through E u in Fig. aL

On the driving shaft -at-n is rigidly fixed through the key 7L-the sleeve -bfitted at one end with the toothed rim -c--.

@n the sleeve -b is fitted a further sleeve md* which can freely revolve on b through an intermediate of the bush -e-, but cannot slideaxially, being prevented therefrom by thc toothed rim -c at one end and by the driving shaft -a at the other end* The sleeve -dcarries at one end the gear wheel foperating the distribution; at its other end it is fitted with the toothed rim'-gwhich is identical to the toothed rim -cand similarly arranged-'- A ring 7lhaving double Tesection peripherally surrounds both rims -i-cand -(Z- and is laterally held between two discs -Z- and Zlthat are secured together by bolts -m-. On these bolts are pivotally mounted two sets of pawls, namely, the pawls -nengaging the teeth of rim -i-c `the sleeve -b-.

Foa POWER TRANSMISSION.

1923. Serial No. 650,713.

and the'pawls -nengaging the teeth of rim The pawlends engaging with the teeth are so shaped as to allow of the pawls swinging about their pivots -m-, as shown in dotted lines inI Fig. 4. The result is that a certain angular displacement is permitted between the sleeve '-b-, ring -iand sleeve cilaccordingly the driven sleeve -cZ`- and the f driving sleeve -bcan be displaced rela- .tively to one another'by a certain angle, viz.

by the angle corresponding to the amount by which the pawls are permitted to swing about their pivots -m-.

The pawls ,-nr- (and -n), opposite to their end engaging with the teeth of rims -c and fjrespectively, are fitted with an extension or tail portion- Against each side face of these tail portions bears one end of the springs -0- whose other end abuts against diaphragms -psolidly secured to the ring z-. The duty of the springs *ois to counteract the swinging of the pawls *0"6 (and -/n,-) on their pivots -min both directions.-

The sleeve -b-, through the toothed rim -c-, transmits its revolving motion to the pawls -n-f. Due to the resistance opposed by the springs 0- to the swinging of the pawls -naboutz the pivots -m-, ther pawls -ncompel, yet with a certain elasticity, the ring zlto revolve along with In its turn the ring through the elastic intermediary of the other set of pawls -/n-, carries along with it the sleeve dh by which the distribution is operated.- i

It will therefore be seen that the drive between the shaft -aand the driven gearwheel -foperating the distribution takes place through two sets of resilient joint members, by which the eventual vibrations of the driving shaft are completely taken up.- y

I-Iaving now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

l. A device of the character described comprising a driving member, a driven member, toothed rims carried by thel driving and driven members, a ring surrounding said toothed rims, pawls pivotaliy mounted in said ring and engaging the toothed rims, and opposed springs acting on each pawl and maintaining the latter in an intermediate balanced position.

2. A device of the character described comprising a driving member, a driven member, toothed rims carried by the driving and drlven members, anannular member arranged about the toothed rims, sets of pawls coacting respectively with the driving and driven toothed rims, means pivotally mounting the pawls in the annular member, and opposed springs coacting with each pawl to maintain the latter in an intermediate balanced position.

Signed at-Milan (Italy), this 22nd day of June 1923.

GIUSTINO CATTANEO. 

